These general purpose plane windows are polished to λ / 10 flatness except where indicated otherwise. They are intended for transmissive use and are parallel to better than 10 arc seconds. Select a coating appropriate to your application or contact us with your special coating requirements.
If thickness ≤ 1.5mm : λ/4 @ 633nm
If thickness > 1.5mm : λ/10 @ 633nm